Closure



H. R. KEYS Aug. 14, 1951 CLOSURE Filed March 21, 1947 INVENTOR. HOWARD R. KEYS ATTORNEY UNITED STATES PATENT OFFICE t t CLOSURE Howard E. Keys, Philadelphia, Pa. Application March 21, 1947, Serial No. 736,185

2 Claims. (Cl. 22024) (Granted under the act of March 3, 1883, as amended April 30, 1928; 370 O. G. 757) This invention relates to improvements in closures and more particularly to improvements in covers for receptacles.

The primary object of this invention is to provide a cover of simple and durable construction adapted to seal a receptacle.

Another object of the invention is to provide a cover for a receptacle adapted to expedite refilling said receptacle.

Another object is to provide a cover for a receptacle adapted to seal said receptacle hermetically when the pressure therein is substantially higher than atmospheric pressure.

Still another object is to provide a cover for a receptacle adapted to provide a greater factor of safety in use than covers employed presently.

Another object is to provide a removable cover for a receptacle adapted to remain secured to said receptacle during a refilling operation.

Another object is to provide a cover for a receptacle adapted to deter entry of foreign matter into said receptacle.

Further objects and advantages of this invention, as well as its construction, arrangement and operation, will be apparent from the following description and claims in connection with the accompanying drawing, in which Fig. 1 is an exploded elevation of a cover for a receptacle, partly in section, showing a preferred embodiment of the invention; and

Fig. 2 is a plan view thereof.

Similar numerals refer to similar parts throughout the several views.

A disc H having a concave upper face I3 is provided with a threaded bore l5 adapted to secure said disc to the threaded mouth of a receptacle. An annular port I'l passing through the upper face [3 of said disc is provided with a wall 19 adapted to lie contiguous with the surface of a plunger ball hereinafter described. A plurality of bores 2| in the periphery of said disc facilitate tightening said disc on the threaded mouth of a receptacle.

A plunger ball 23, preferably in the shape of a hemisphere, is provided with an annular flange 25 circumscribing its planar surface and a lug 21 positioned distal said planar surface.

A lid 29 is provided with an annular flange 3| adapted to seat said lid on the concave face of the disc II and a suitable handle 33. A chain 35 secured medial the lower face of said lid, as by a bolt 31, passes through the port I! and is secured to the lug 21 of the plunger ball 23.

When the disc H is secured to the mouth of a receptacle, the lid. 29 is suspended at an angle to said mouth and the plunger ball 23 suspended within said receptacle, thereby permitting filling said receptacle through the port l1. After the receptacle is filled, by pulling the lid 3| away from the mouth, the plunger ball 23 is brought up to seating engagement with the wall l9. If the said plunger ball is retained in that position While the pressure inside the receptacle is increased substantially, such pressure will retain said ball in that position. At such time, the lid 3| is placed upon the concave face of the disc, the upper portion of the plunger ball, the lug thereof and the chain being disposed in the recess defined by said concave face and. said lid. When the pressure inside the receptacle is decreased and approaches atmospheric pressure, the said plunger ball is unseated and is again suspended in the receptacle.

The above-described receptacle top has been found particularly advantageous for use on pressure tanks, e. g., tanks which contain paint under pressure for delivery to spray guns. So long as pressure remains in the tank the plunger ball remains seated in the port I! and an operator, before attempting to add paint through the port, can release the pressure by suitable valves in the pressure line (not shown). Without the warning given by the plunger ball the operator might try to open the tank while there was pressure still in it. Serious accidents have resulted from such attempts heretofore. The present device removes this danger.

Various modifications and changes can be made in the subject device without departing from the scope of the invention.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

I claim:

1. A closure for a receptacle comprising a disc having a concave face, a depending threaded collar and a receptacle-filling port, a hemisphereshaped valve in registry removably with the wall of said port and the nether surface of said disc, a cover plate adapted to be seated on said disc, and a chain passing through said port and linking said valve and said cover plate.

2. A closure for a receptacle comprising a disc having a concave face, a depending threaded collar and a receptacle-filling port, a hemisphereshaped valve having an annular flange circumscribing its planar surface, said hemisphere portion and. said flange portion being in registry 3 removably with the wall of said port and the nethersurface of said disc respectively, a cover plate adapted to be seated on said disc, and a chain passing through said port and linking said valve and said cover plate.

HOWARD R. KEYS.

REFERENCES crrnn The following references are of record in the file or this patent:

UNITED STATES PATENTS Number Name Date 173,972 Lancaster Feb. 22,1876

Number Number Name Date Stuyvesant Aug. 20, 1889 Bickel Feb. 4, 1902 Petersen June 2'7, 1916 Davis Mar. 15, 1921 Seek Sept. 26, 1933 Overbury Dec. 4, 1934 Hopkins July 19, 1938 Kelsey June 6, 1939 FOREIGN PATENTS Country Date Great Britain Feb. 24, 1914 

